P The Turbine System

Question 1

What are the 3 types of turbine blades?

Answer 1

• Impulse blades
• Reaction blades
• Impulse-reaction blades

Question 2

In an impulse blade stator what happens to P, V and T?

Answer 2

P - decreases
V - increases
T - decreases

Question 3

In an impulse blade rotor what happens to P, V and T?

Answer 3

P - constant
V - decreases
T - constant

Question 4

On 50% reaction stator what happens to P, V and T?

Answer 4

P - decreases
V - increases
T - decreases

Question 5

On 50% reaction rotor what happens to P, V and T?

Answer 5

P - decreases
V - increases
T - decreases

Question 6

On a reaction stator what happens to P, V and T?

Answer 6

P - constant
V - constant
T - constant

Question 7

On a reaction rotor what happens to P, V and T?

Answer 7

P - decreases
V - increases
T - decreases

Question 8

What is the term used for a turbine blade steadily increasing in length?

Answer 8

Blade creep

Question 9

What is active clearance control?

Answer 9

Bleed air is pumped around the turbine casing causing it to expand, this controls the blade tip clearance in the turbine section